Gemini 4 Hydrogen and Orchestrator

Google has released Gemini 4 Hydrogen alongside a new "Orchestrator" model option that dynamically switches between Hydrogen and the more powerful Gemini 4 Carbon to optimize for speed, cost, and quality during coding tasks. Orchestrator achieves near-Carbon performance while consuming 24% less quota and running 19% faster by having Carbon handle complex planning and reasoning while Hydrogen executes simpler tasks like writing code and running tests. Developers can also manually pair these models using the Antigravity SDK for more granular control over task routing.